A year after the lives of Zanzibar’s elderly were transformed by the introduction of pensions for people aged 70 or over – a first for east Africa – the benefits for the semi-autonomous region of Tanzania are plain to see

Kate Holt joins a rapid response mission to a remote area of Unity state in South Sudan, where bring vital supplies to 15,000 people in Thanyang, Unity state, in a region with no health clinics, boreholes, schools or roads